• Scan reveals Spaniard did not break bone in left foot
• Colin Fleming and Ross Hutchins in last eight of men's doubles

Rafael Nadal, the No1 seed, hit with the 16-year-old Briton, Evan Hoyt, left, at Wimbledon on Tuesday. Hoyt happened to be in the locker room when Nadal turned up looking for a practice partner. Photograph: Pool/Getty Images

Crisis over, now the real drama can begin. Just under 24 hours after he feared he might have broken a bone in his left foot, Rafael Nadal was back on court, putting his practice partner through the mill as usual. An MRI scan after his victory over Juan Martín del Potro showed no serious damage had been done and, barring any late problems, the defending champion will be fit to take his place against Mardy Fish, the last remaining American, in the quarter-finalson Wednesday.

The thunder and rain that hammered down on Tuesday meant it was almost 6pm when Nadal was able to set foot back on the grass but he looked happy enough as he traded blows with the 16-year-old Briton, Evan Hoyt. Nadal had not arranged a practice partner but Hoyt, who happened to be in the locker room, gladly accepted the invitation as the former champion, Pat Cash, made way to accommodate them.

The day off between matches at grand slams will only help and he will be the overwhelming favourite when he takes on the No10 seed Fish, a man he has dropped only one set against in five meetings. Fish has dropped serve just once in the entire tournament and he is in the last eight for the first time in nine attempts. His game is well-suited to grass and his confidence is high.

"I know my style can be successful on these courts," Fish said. "I think [the key] is not having him take you out of your style of play. Sometimes Rafa can defend so well you don't attack as much as you probably should. I'll go into the match knowing my limitations but trying to play as good as I can, because I'll certainly need to."

Roger Federer turned his arm over in a gentle practice session as he prepared for his match with Jo-Wilfried Tsonga. On paper, the Frenchman has the game to trouble the six-times champion but the Swiss knows what to expect. "I think he's got the weapons to be a huge threat on grass, make a run here," Federer said. "It's a tough draw, but I'm ready for it."

The remaining quarter-final is between the 18-year-old qualifier Bernard Tomic and the No2 seed Novak Djokovic. Tomic has been the revelation of the tournament and the Australian is the youngest quarter-finalist since Boris Becker in 1986.

Between the showerson Tuesday, there was a notable success for Colin Fleming and Ross Hutchins as they beat Ashley Fisher and Stephen Huss 6-3, 6-4, 6-2 to become the first British pair to reach the quarter-finals of the men's doubles since 1993. Liam Broady and Daneika Borthwick reached the last 16 of the boys' and girls' singles respectively but Oliver Golding and George Morgan were beaten.